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The caster axle holds the wheel, or wheels, into the caster fork. There are three basic types of axles...
- Snap On: The snap on axle is typically used on lightweight twin-wheel casters and is recommended for only light-duty applications. With this axle type, the wheels are pressed onto the axle.
Riveted: In a twin-wheel caster, a riveted axle provides a stronger, more secure way to hold the wheels onto the axle.
In a single wheel caster, this is the least expensive way to hold the wheel in the caster. In this case, the wheel cannot be removed for service or cleaning.
- Nut & Bolt: A threaded bolt and locking nut hold the wheel into the caster fork, which allows the wheel to be easily removed for service or replacement.
For lubrication, some nut & bolt axles are supplied with a grease fitting for use with sleeve or roller bearing wheels. Ball bearing wheels cannot be lubricated through a grease fitting, so no grease fitting is provided.
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